40 citations · 96 across the 21 of their papers we have counts for
9 papers · 1 filter
Bogolyubov excitons as a microscopic origin of two-level systems
Andrey Grankin, Victor Galitski
Two-level systems (TLS) are a leading source of decoherence and dielectric loss in Josephson-junction qubits, yet their microscopic origin remains unresolved. We propose an intrins…
Enhanced Cooper pairing in nano-patterned metals
Masoud Mohammadi-Arzanagh, Andrey Grankin, Victor Galitski +1
Nano-patterning has been shown to be a powerful tool for manipulating the vibrational modes of elastic structures, with applications such as optical-mechanical mode coupling. Inspi…
Negative superfluid density and spatial instabilities in driven superconductors
Andrey Grankin, Victor Galitski, Vadim Oganesyan
We consider excitation of Higgs modes via the modulation of the BCS coupling within the Migdal-Eliashberg-Keldysh theory of time-dependent superconductivity. Despite the presence o…
Enhanced Cooper Pairing via Random Matrix Phonons in Superconducting Grains
Andrey Grankin, Mohammad Hafezi, Victor Galitski
There is rich experimental evidence that granular superconductors and superconducting films often exhibit a higher transition temperature, , than that in bulk samples of the…
Integrable-to-Thermalizing Crossover in Non-Equilibrium Superconductors
Andrey Grankin, Victor Galitski
Motivated by the experiment by M. Budden {\em et al.} [Nature Physics {\bf 17}, 611 (2021)], who observed signatures of long-lived photo-induced superconductivity, we develop an ac…
Circuit QED detection of induced two-fold anisotropic pairing in a hybrid superconductor-ferromagnet bilayer
C. G. L. Bøttcher, N. R. Poniatowski, A. Grankin +5
Hybrid systems represent one of the frontiers in the study of unconventional superconductivity and are a promising platform to realize topological superconducting states. Owing to…
Dark Andreev States in Superconductors
Andrey Grankin, Victor Galitski
The conventional Bardeen-Cooper-Schrieffer (BCS) model of superconductivity assumes a frequency-independent order parameter, which allows a relatively simple description of the sup…
Interplay of hyperbolic plasmons and superconductivity
Andrey Grankin, Victor Galitski
Hyperbolic plasmons are collective electron excitations in layered conductors. They are of relevance to a number of superconducting materials, including the cuprates and layered hy…
Enhancement of superconductivity with external phonon squeezing
Andrey Grankin, Mohammad Hafezi, Victor M. Galitski
Squeezing of phonons due to the non-linear coupling to electrons is a way to enhance superconductivity as theoretically studied in a recent work [Kennes et al. Nature Physics 13, 4…